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ussr

Former nation extending from eastern Europe E across Siberia to the Pacific Ocean. In the N it bordered on the Arctic Ocean and in the S on China, and on southwestern Asian countries. The USSR, successor to the Russian Empire, was the world’s largest nation in area and was third in population. It co... read more

welcome to venus

The hellish world often described as Earth’s evil twin. ... read more

why does looking at the sun damage your eyes

Never look at the Sun unless you are using specially designed glasses that are intended for this purpose. ... read more

how plants grow

The Life Cycle of Plants ... read more

how the body work

All the organs and systems of your body work together. When they work correctly you move, you fight off germs and diseases, you heal, you learn, you grow, and you age. In other words, you live. ... read more